conclusions it seems that the incidence of different types of stroke-induced aphasia in ahvaz is influenced by the calendar-temporal changes. according to the findings, to prevent the occurrence of stroke-induced aphasia, necessary counseling should be provided for lifestyle changes. results according to the obtained results 39.9% of the studied patients had a stroke-induced aphasia. the highes...

Studies from human and non-human species have demonstrated a breakdown of functional corticocortical connectivity during general anesthesia induced by anesthetics with diverse molecular, neurophysiological, and pharmacological profiles. Recent studies have demonstrated that changes in long-range neural communication, and by corollary, functional connectivity, might be influenced by cross-freque...

background: this paper investigated the effect of daylight on morning and night melatonin, subjective general health using ghq questionnaire, sleepiness and alertness on elderly who lived in nursing houses. methods: nineteen nursing home residents participated voluntarily. they exposed to daylight from 9 to 10 a.m. and from 4 to 5 p.m. for 6 wk. the level of melatonin in the morning and at nigh...

in islamic civilization, rhetoric is the product of a great attempt to find out the secrets of quranic language; nevertheless, the achievements of such studies have been mechanically applied to persian which, compared to arabic, has a different linguistic system and literary conventions. this approach has brought about problems in defining literary terms, internal rhythm being one of them. this...

the concept of “form of literary work” highly significant in formalism depends on the two following suggestions. 1) any part of literature, from word to speech, must be studied and known on the basis of its relationship with other parts or constitutes. thus, recognition of structural or original foundation of the works of art is the most important function of any given literary research. 2)...

To examine the role of the gamma-aminobutyric acid-A receptor-mediated system in the timing of the proestrous LH surge, we observed the free running activity rhythm and the timing of the LH surge simultaneously in blinded cycling female rats. Blood samples were obtained from unanesthetized freely moving rats through an intraatrial cannula. Five hours after the activity offset on the day of proe...

Subjects operating a brain-computer interface (BCI) based on sensorimotor rhythms exhibit large variations in performance over the course of an experimental session. Here, we show that high-frequency γ-oscillations, originating in fronto-parietal networks, predict such variations on a trial-to-trial basis. We interpret this finding as empirical support for an influence of attentional networks o...

There is considerable interest in the role of coupling between theta and gamma oscillations in the brain in the context of learning and memory. Here we have used a neural network model which is capable of producing coupling of theta phase to gamma amplitude firstly to explore its ability to reproduce reported learning changes and secondly to memory-span and phase coding effects. The spiking neu...

The hypothesis that gamma-band oscillations are related to the representation of an environmental scene in the cerebral cortex after binding of corresponding perceptual elements is currently under discussion. One question is how the sensory system reacts to a fast change in the scene if perceptual elements are rigidly bound together. A reset of the gamma-band oscillation forced by a change in s...